Improved: Tabs can be closed by middle click in the Configuration Editor. Ctrl+A can be used to select all rows.

Fixed: When a line was edited manually in the Configuration Editor, the file was not saved automatically when "Instant mode" was enabled.

Editor/widgets/MiddleClickTabBar.cpp

@@ -0,0 +1,42 @@
+/*
+    This file is part of Equalizer APO, a system-wide equalizer.
+    Copyright (C) 2017  Jonas Thedering
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include <QMouseEvent>
+
+#include "MiddleClickTabBar.h"
+
+MiddleClickTabBar::MiddleClickTabBar(QWidget* parent)
+	: QTabBar(parent)
+{
+}
+
+void MiddleClickTabBar::mouseReleaseEvent(QMouseEvent* event)
+{
+	if (event->button() == Qt::MidButton)
+	{
+		int tabIndex = tabAt(event->pos());
+		if (tabIndex != -1)
+		{
+			emit tabCloseRequested(tabIndex);
+			return;
+		}
+	}
+
+	QTabBar::mouseReleaseEvent(event);
+}